So i just picked this 30 gallon acrylic pentagon aquarium from a dude on craigslist for $40! It has 2 fittings on the bottom for filtration. Ive only ever used HOB filters, so this is new to me. My questions are: Does this eliminate my ability to run sand as substrate? How do i plumb it that it wont look like crap? Im assuming i have to run a canister type filter underneath. FYI, it will be freshwater. Thanks for the info in advance!
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